 <template>
  <div class="loading_container">
    <div class="load_img" :style="{backgroundPositionY: -(positionY%7)*2.5 + 'rem'}">
    </div>
    <svg class="load_ellipse" xmlns="http://www.w3.org/2000/svg" version="1.1">
      <ellipse cx="26" cy="10" rx="26" ry="10" style="fill:#ddd;stroke:none;"></ellipse>
    </svg>
  </div>
</template>

<script>
export default {
    data() {
        return {
            positionY: 0,
            timer: null
        };
    },
    mounted() {
        this.timer = setInterval(() => {
            this.positionY++;
        }, 600);
    },
    beforeDestroy() {
        clearInterval(this.timer);
    }
};
</script>

<style lang="stylus" scoped>
@import '../../assets/style/mixin';

@keyframes load {
  0% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-50px);
  }

  100% {
    transform: translateY(0px);
  }
}

@keyframes ellipse {
  0% {
    transform: scale(1);
  }

  50% {
    transform: scale(0.3);
  }

  100% {
    transform: scale(1);
  }
}

.loading_container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  wh(2.5rem, 2.5rem);
}

.load_img {
  wh(100%, 100%);
  background: url('../../assets/image/common/icon_loading.png') no-repeat 0 0;
  background-size: 2.5rem auto;
  transform: translateY(0px);
  animation: load 0.6s infinite ease-in-out;
  position: relative;
  z-index: 11;
}

.load_ellipse {
  position: absolute;
  wh(2.6rem, 2rem);
  top: 2.2rem;
  left: 0.2rem;
  z-index: 10;
  animation: ellipse 0.6s infinite ease-in-out;
}
</style>
